So I installed the official version of Opera named "opera-stable" in the Ubuntu Software Center.

  • When I run it from launcher, it launches twice and displays a message (Translated to English by myself, may not be perfect):

Cannot read user configuration files. Some features may not be available and any changes performed this session will not be saved. (Print Screen Image)

  • When I run it from terminal, it throws these errors:

[1226/165646:ERROR:desktop_window_tree_host_x11.cc(889)] Not implemented reached in virtual void views::DesktopWindowTreeHostX11::InitModalType(ui::ModalType) [1226/165646:ERROR:download_history_importer.cc(50)] Failed to read a tag or its data. [1226/165646:ERROR:migration_assistant.cc(87)] Could not open file: wand.dat [1226/165646:ERROR:extensions_importer.cc(58)] Reading widgets.dat failed

  • Running it with the "sudo" command works perfectly well, and saves all user settings. Though from what I read so far, having to run a browser with sudo is not a good thing.

Now, I'm a newbie, but I followed this which recommends:

sudo chown -R group_name.user_name ~/.opera

and indeed I seem to be the owner of all the folders and subfolders that opera uses (I can't remember the command I used to check that) but it still doesn't work.

I also tried loads of other things like updating, upgrading, apt-mark hold command, reinstalling opera (both using the software center and manually unpacking .deb file) and maybe something more. As I said, I'm a newbie, I only use Ubuntu for 2 days, I just want to get Opera up and running properly, but I spent those 2 days looking for an answer.

Any idea?


Here's a screenshot of .opera's permissions. Sorry for the language. I should switch to English.

  • Right-click on .opera > Properties > Permissions and then edit your answer with the screenshot – Raphael Dec 26 '15 at 16:58
  • Do you remember running this command - sudo nautilus ? – Raphael Dec 26 '15 at 17:01
  • Ehm, could you tell me where do I find ".opera"? And no, I've never seen the nautilus command – swifterik Dec 26 '15 at 17:02
  • Goto` /home/<username>` and then press Ctrl + H – Raphael Dec 26 '15 at 17:03
  • Added screenshot. Should I change everything to "creating and deleting files"? – swifterik Dec 26 '15 at 17:10

First launch nautilus as root. To do that type the following:

gksu nautilus

Then right-click on /home/<username>/.opera and click on Properties, then to Permissions.

If you are unable to find .opera then press Ctrl + H to show the folder.

Now, change

Owner to <username>

Group to <username>

And all else to:


Also, check similarly for your /home & /home/<username> folders.

EDIT: Also, change the permissions of the following folders to the one as shown in your shared screenshot:





  • Thanks. I did what you said but unfortunutely it didn't work. The error message still pops up when I run Opera, and the terminal still displays error messages before running Opera. – swifterik Dec 26 '15 at 17:42
  • @swifterik - checking, will reply in a few minutes – Raphael Dec 26 '15 at 17:43
  • @swifterik - edited!! – Raphael Dec 26 '15 at 17:56
  • Both config and cache are alredy set like this. Maybe I should set them to access file as well? – swifterik Dec 26 '15 at 18:07
  • opera inside config and cache? – Raphael Dec 26 '15 at 18:08

I gave up, reinstalled Ubuntu and installed Opera from opera.com and it works OK. Hopefully it's rare for this problem to occur. I must've done something terribly wrong to cause that.

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